10.4 Understanding Mechanical Advantage in Machines

What is the mechanical advantage of a machine that requires an input force of 50 N to lift a load of 200 N?

• 0.25

• 4

• 2

• 8

Which of the following statements best describes mechanical advantage?

• It is the ratio of the output force to the input force.

• It is the ratio of the input force to the output force.

• It is the sum of the input and output forces.

• It is the difference between the input and output forces.

A lever is used to lift a rock. If the effort arm is 3 meters long and the load arm is 1 meter long, what is the mechanical advantage of the lever?

• 1

• 2

• 3

• 4

Which type of simple machine is a ramp considered to be?

• Lever

• Pulley

• Inclined Plane

• Wheel and Axle

If a pulley system has a mechanical advantage of 5, what does this imply about the force needed to lift a load?

• The force needed is 5 times greater than the load.

• The force needed is 5 times less than the load.

• The force needed is equal to the load.

• The force needed is 10 times less than the load.

A wheel and axle system has a wheel radius of 0.5 meters and an axle radius of 0.1 meters. What is the mechanical advantage of this system?

• 0.2

• 2

• 5

• 10

Which of the following is NOT a type of simple machine?

• Lever

• Screw

• Gear

• Wedge

In a first-class lever, where is the fulcrum located?

• Between the effort and the load

• At the end of the lever

• Closer to the load

• Closer to the effort

What is the formula for calculating the mechanical advantage of an inclined plane?

A screw has a pitch of 0.01 meters and a circumference of 0.1 meters. What is the mechanical advantage of the screw?

• 0.1

• 1

• 10

• 100